Handbook of projection for theatre managers and motion picture projectionists ([1922])

Record Details:

Title:
Handbook of projection for theatre managers and motion picture projectionists
Date:
[1922]
Publisher:
New York, Chalmers
Volume:
Handbook of projection for theatre managers and motion picture projectionists
Leaf #:
000311
Language:
English
Collection:
Books
Format:
Books
Contributor:
Gerstein - University of Toronto
Sponsor:
MSN
Coordinator:
Media History Digital Library
Description:
14
Date Added:
July 19, 2022
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276 HANDBOOK OF PROJECTION FOR ing on sprocket tooth and pulling film around under sprocket, (c) Film running off sprocket, (d) Intermittent sprocket teeth "climbing" one or more holes, thus shortening or "losing" one of the loops, and throwing the picture out of frame on the screen, (e) Side movement of picture due to crookedness of film as a whole, (f) Takeup, pulling film over lower sprocket, thus shortening or losing the lower loop. All this is apt to occur, even though the sprocket holes be perfectly matched on one side, if they be imperfectly Figure 77F A is a splice which may cause sprocket holes to clamp sprocket teeth, with consequent jump of picture on screen, or even the pulling of the film around sprocket. It certainly will cause side movement of picture on screen. At B is a -broken sprocket hole which has been improperly notched, proper shape of notch being shown at D or F, though notches D and F are correct as to shape only. They should not have been made either in or so near a splice. As the injuries to the film now are all that portion ,from A to D should be cut out and a new splice made. At G a splice is necessary because the injury includes three successive sprocket holes. matched on the other side, because in that event the hole or holes on one side will be small, and the film, as a whole, will be crooked at that point. You will therefore see the great importance of matching